Axiomatic Iron

Axiomatic Iron is the designation given to telluric iron that has been subjected to nullpoint conditioning and thereby rendered incapable of supporting an untrue statement. It is distinguished from ordinary telluric iron not by composition — assay returns are identical to four decimal places — but by behaviour: an inscribed statement on Axiomatic Iron either holds or the plate fractures. No third outcome has been recorded. The material is produced only under Iron Dictum authority and is stored, in its finished state, in the lower galleries of Floor 891 the Iron Archive.

Properties

Axiomatic Iron is prepared by drawing a plate of telluric iron through the field of an Axiomatic Nullpoint over a period of not less than eleven days. The plate loses approximately one part in nine thousand of its mass during conditioning; the loss is not recoverable and is not accounted for in any return. What remains is a dull, faintly warm metal that rings flat when struck.

The diagnostic behaviour is the fracture. An Iron Nib is used to incise a statement of fact into the conditioned face. If the statement is true, the incision closes behind the nib and the plate is unchanged. If it is not, the plate splits along a plane perpendicular to the incision, usually within the hour and always within the day. Nothing else is known to cause this. Plates bearing false inscriptions have been cooled, weighted, sealed in lead, and once, in the winter of 4,412, sung to for three nights by the entire Choristers' Bench; all of them split.

"The iron does not judge. It declines to bear. The distinction is recorded here because two Superiors have lost their appointments over it."

— Seventh Iron Strongroom, marginal note in the hand of Under-Scribe Halvor Renn

Relationship to the Iron Dicta

Axiomatic Iron is not itself a Dictum and may not be cited as one. It is the substrate on which Iron Dicta are tested before the Iron Nib is committed to a permanent plate. Since the Primary Iron Dictum was struck into unconditioned telluric iron in a single sitting, the test has never been applied to it, and the question of whether it would survive one is not entertained in writing.

Official seals of telluric iron attached to Iron Dicta are sometimes conditioned before affixing, a practice called sealing axiomatic. The Iron Annex records that sealing axiomatic was standard for nine hundred years and then, following the Halm Recession, was not. The Annex does not explain the Halm Recession. It gives a date, a floor, and the words "and thereafter not," which is all that survives.

The Recession of 3,880

In the third month of 3,880 a run of forty-one conditioned plates was issued to the Iron Spires maintenance office bearing the operational parameter "the lower gallery is dry."^{[Annex 7, folio 12]} The lower gallery was not dry. Thirty-nine plates split within the day. Two did not, and this is the whole difficulty of the subject.

The two surviving plates were examined by Scribe Adela Vint of the Iron Archive, who observed that the gallery had been dry at the moment of inscription and had flooded later the same afternoon, when a Whispering Iron conduit on the level above was opened for the seasonal sounding. Vint proposed what is now called the Vint Reading: that Axiomatic Iron tests the statement as of the instant of incision and holds no view on what happens afterwards. The Reading was adopted by Ninth Concordance, Annex 2, and rescinded by Eleventh Concordance, Annex 2, which uses the same clause number.

Scholarly disagreement

The Vint Reading is not now in force, and the question of why not has divided the Archive for four centuries. The Seventh Iron Strongroom holds that the Eleventh Annex was intended to rescind only the second sentence of the Ninth and that its scrivener, by a fault in layout, struck the whole. The Iron Annex holds the opposite, that the rescission was deliberate, and cites the hand of the Under-Scribe, which is steady throughout.

A third position, associated with the Axiomatic Waveguide school, denies that the two surviving plates were true at inscription at all. On this view they were false, and failed to split because the plating at their edges had been forged with an unpurified gall wash that insulated the incision from the nullpoint field. The school has produced no fracture that supports it and has produced eleven that do not.

Notable holdings

Vint Plates

The two survivors of 3,880, retained unbroken under seal at Floor 891. They are the Archive's most disputed objects and are not permitted to be struck.

The Halm Register

A ledger of conditioned plates issued between 3,901 and 4,017, with fracture outcomes recorded in three columns. The third column is blank from folio 40 onward.

Renn's Draught

A plate incised with the statement "this plate will not be read." It is read on average four times a year, chiefly by visiting parties, and has not split.

Finished Axiomatic Iron is stored face-down at all times, since the conditioning does not lapse but the surface will take an impression from anything resting on it. The lower gallery is now kept dry.